Note 5 - Securities (Details) - Available for Sale Securities (USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
	Mar. 31, 2014	Dec. 31, 2013
Available for Sale:
Amortized Costs	$ 207,155	$ 203,958
Gross Unrealized Gains	1,344	1,255
Gross Unrealized Losses	18,098	22,811
Available-for-sale Securities Fair Value	190,401	182,402
US Government Agencies [Member]
Available for Sale:
Amortized Costs	173,798	169,818
Gross Unrealized Gains	233	199
Gross Unrealized Losses	17,696	22,163
Available-for-sale Securities Fair Value	156,335	147,854
States and Political Subdivisions [Member]
Available for Sale:
Amortized Costs	21,634	22,830
Gross Unrealized Gains	813	746
Gross Unrealized Losses	39	120
Available-for-sale Securities Fair Value	22,408	23,456
Mortgage-backed Securities [Member]
Available for Sale:
Amortized Costs	2,392	2,627
Gross Unrealized Gains	215	213
Available-for-sale Securities Fair Value	2,607	2,840
Corporate Securities [Member]
Available for Sale:
Amortized Costs	8,802	7,804
Gross Unrealized Gains	83	97
Gross Unrealized Losses	312	506
Available-for-sale Securities Fair Value	8,573	7,395
Other Securities [Member]
Available for Sale:
Amortized Costs	529	879
Gross Unrealized Losses	51	22
Available-for-sale Securities Fair Value	$ 478	$ 857